Quality of life will be assessed by the QLQ-30 questionnaire of the EORTC at study entry, after neoadjuvant chemotherapy, start and end of the adjuvant chemotherapy and at each follow-up study visit. Representative histological samples are reviewed and stored by the reference pathologist at the University Hospital of Zurich. These samples will also be used to determine the histological response and extent of cytopathic effects. Furthermore, the nutritional status is assessed from all patients by the prealbumin serum levels at study entry and prior to surgery. Further translational research is desired and will be individually organized by each center.